Javascript读取.txt文件并以HTML显示

Question

I'm trying to have JavaScript on my HTML page read from a .txt file (status.txt) in the same directory and display the contents in two different font colors based on the information in the .txt file. I currently have it displaying the text on the page just fine, but I wanted to make it a bit more noticeable. Here is my current code to display the text with the basic #ccc hex.

<script type="text/javascript">
  loadXMLDoc();
</script>
<script type="text/javascript">
  function loadXMLDoc() {
    var xmlhttp;
    if (window.XMLHttpRequest) {
      xmlhttp = new XMLHttpRequest();
    }
    xmlhttp.onreadystatechange = function() {
      if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
        document.getElementById("status").innerHTML = xmlhttp.responseText;
      }
    }
    xmlhttp.open("GET", "status.txt", true);
    xmlhttp.send();
  }
</script>

<h3 id="status" style="padding-right: 7px; padding-left: 7px; margin-top: 2px; font-size: 11px; color: #cccccc">
  Status
</h3>

The text file contents are overwritten every time a .vbs file is ran. It will either say:

6/11/2016 8:58:30 AM Script Started

or

6/11/2016 9:31:12 AM Script Stopped

The only thing that changes is the timestamp. I would like the text to display as red when it says "(timestamp) Script Stopped" and green when it says "timestamp) Script Started". If anyone could help, that'd be great!

Answer 1

You can use simple RegEx to add proper classes to your text.

document.getElementById("status").innerHTML = xmlhttp.responseText
    .replace(/(\b\d.+?Started)/ig,'<span class="start">$1</span>')
    .replace(/(\b\d.+?Stopped)/ig,'<span class="stop">$1</span>');
    //\b -start of word, \d - any digit 0 to 9, . - any character
    // +? - one ore more, not greedy 

Answer 2

var color = xmlhttp.responseText.indexOf('Started') !== -1 ? 'green' : 'red';
document.getElementById("status").innerHTML = '<span style="color: ' + color + '">' + xmlhttp.responseText + '</span>';